Die casting apparatus



Jan. 29. 1946.

G. L. CHERRY ETAL DIE CASTING APPARATUS Filed Aug. l0, 1943 4Sheets-Sheet 1 /NvENro/es LCf/E/e/ev C? C. VEALE HTTOE/VEY Jan. G, L,CHERRY ET AL l DIE CASTING APPARATUS Filed Aug. 10, 1943 4 Sheets-Sheet2 H64 l I y ly /fef n (26 /30 (/50 /55 /32 77 154 53 '/NvENTo/es G. L.CHERRY C. C. VEALE Afton/EY Jan. 29; 1946,

G. L. CHERRY ET AL DIE CASTING APPARATUS Filed A ug. 10," 1943 4Sheets-Sheet 5 /Nvs/ro'es G. l. MERRY C. C: VEA/.E

TTOENEY Jan. 295 1946. G. L. CHERRY ETAL 2,393,583

DIE CASTING APPARATUS Filed Aug. 10, 1943 4 Sheets-Sheet 4 HG. 7 F/G /59/N VE N TOES G L .Cf/Rev h C. C. VEALE [46 f BY//HrrR/-VEY masseuses.zo, 194s einen asentar DIE @ASG ARATWS George L. merry, WcsternSprlngs.'and Charles l C. Veille, eaten, lili, more to n Electric illcunp.,incorpora, New Yorin,

N. Y., a corporation or Ncw'lforh V Application i t! 11 ma.,

This invention relates to die casting apparatus and more particularly toa die casting apparatus having an adjustable injecting plunger andmelting pot to permit the injection of the die casting material atselected points of the die cavities.

lt is an object of the present invention to prol vide a simple readilyadjustable die casting apparatus.

ln accordance with one embodiment oi the inventlon, a diecasting'machine including separable dies is provided with e. meltingpot, having a built-in gooseneck, wherein the pot may be adiustedtransversely of the direction oi' movement of the dies to permitofi-center gating or the die cavities. In this apparatus, the injectionplunger is mounted on a cross head so that it may he slid into positiontoy cooperate with an injection cylinder seated in the gooseneck, and a.bali and socket connection between the actuating piston for the plungerand the plunger itself permits a limited amount of self-adjustment oithe plunger.

A complete understanding oi the invention may he had by reference to thefollowing detailed description considered in conjunction with .the acecompanying drawings, wherein:

Fig. l is a front elevational view, partly in section, ci a die castingmachine embodying vthe novel features of the invention and showingcooperating dies in place to receive the-die casting material at thecenter of the dies;

Fig. 2 is a' fragmentary vertical sectional iflew showing a pair of diesadapted to be gated ou center;

Fig. 3 is an irregular plan section taken substantiaily along the line 33 of Fig. 1 in the direction of the arrows;

Fig. i is another plan section taken substantially along the line l-ilci Fig. 1 in the direction oi the arrows showing some details ol themelt-1 ine pot;

Fig. 5 is a transverse vertical sectional view taken substantially alongthe line 5-5 of Fig. l in the direction of the arrows showing thearrangement of the supports for the melting pot and some details of itsbuilt-in gooseneck;

Fig. 6 is a fragmentary verticalsectional view taken substantially alongthe line -6-6 of Fig. l

in the directionof the arrows showing some details of the mechanismwhereby the melting pot may be adjusted to properly position it beneathwhichever type of die isbeing used;

'45 serted or removed.

t lo, ists. semaine. esatta tot. sa)

lili) the apparatus is designed to be mounted upon a base it. The diesupporting and actuating nicch-y anismsare not shown in detail hereinsince they vform no partei the invention, it being soient to state thatthe various portions of the dies and their actuating mechanism aresupported in position to permit reciprocation ot e piston rod il havingsuitably lined thereto a cross head it.

The cross head it is slidahle between a pair of upright members itA anditl and carries a plate it on its lower surface, to which a die holderit may be suitably attached. There may loe ilired to init, through whicha nozzle 2t may-entend. The .nozzle tt has an annular shoulder it termedon it. which is of a diameter such that its outer periphery engages theupper edges of the aperture ttf which has a shoulder il formed on it. Aspacer plate it may he set into the aperture tl, resting on the shouldertl, and will serve to properly position the nozzle it in alignment withan entrance aperture il@ oi the lower die it or with an entranceaperture tiloi lower die tt,

` it being understood that plates t@ oi different the entrance apertureor sate in the lower'die` member. The nozzle it is provided with aheating element ti,- connected by suitable conduit t2 tov a source ofcurrent, wherebythe nozzle may be Fig. 7 is a verticalsectional viewtaken substantially along the line l--l of Fig. l in the direction ofthe arrows showing the injecting or Referring to the drawings, it willbe seen that maintained at such a temperature as toprevent freezing ofthe die casting metal in the noz- At the left end of the irregularlyshaped aperture it, the shoulder 2l is cut away to provide a partiallycircular entrance hole 33 (Fig. 3), through which the nozzle 2t may bereadily inwhich serves to interconnect the lower end of the nozzle witha gmeneck designated generally by the numeral t2. As may be seen mostclearly by reference to Figs. 1, 4 and 5, the gooseneck t2 is Vformedintegrally with a melting pot t3, which a passage 52 which becomessmaller from right to lett and terminates' in an upwardly extending lpassage 58. The upwardly extending passage 58 is in communication withthe spacer element 4I andv is defined by a tubular portion 54, fromwhich flanges 55, 58 and -51 extend to the side portion 48, left endportion 45 and side portion 41, respectively, of the melting pot 48. Thepassage 52, at its right end,'termina's in a seat 58 adapted to receivethe lower nesting end of a cylinder 58, in which a shot plunger 88 maybe reciprocated. The cylinder 58 is provided with four entranceapertures 8|, 82, 83 and 84, through which molten die casting metal mayow to the interior of the cylinder. In order to prevent undue agitationof the molten metal in the melting pot and to keep dross from enteringthe cylinder 58, the cylinder has a skirt 85 mounted on it which extendsdown to a point close to the upper surface of the gooseneck and wellbeyond the lower edges of the entrance apertures 8|, 82, 83 and 84.

The melting pot 48 is mounted in a pair of yokes and 18 (Figs. 4, 54 and7), which serve to support it within a casing 11, which has a coverplate 18 suitably supported thereon and extending substantially half-wayfrom the left end ofthe casing to the right end thereof, a suitableaperture 18 being formed in the-cover plate 18 to receive the spacerelement 4I. The right end of the melting pot has a cover plate 88mounted thereon, into which a pouring funnel 8| may be inserted throughan aperture 82 formed in the plate 88. In addition to the aperture 82for receiving the funnel 8|, the cover plate V88 has an aperture 83formed therein through which an actuator rod 84 and the shot plunger 88may extend. The actuator rod 84, as seen most clearly in Figs. '1 and 8,is surrounded byv a sleeve 85, which-is threaded into the shot plunger88 and carries its lower edge 88 in the path of an annular shoulder orball 81 formed on the actuator ment of the sleeve 85 with the shotplunger 88, l the shot plunger will be moved upwardly with the actuatorrod 84.- However, a limited amount oi' -play is thus provided whereby,if the actuator rod is not in exact alignment with the shot plunger 88,there will be no tendency for the plunger to bind inthe cylinder 59.

-At its upper end, the actuator rod 84 is interconnected with a pistonrod 88 by means -oi' a ball andy socket joint 88 and the piston rod 88is, in turn, interconnected with an actuator head 98 adapted to bedriven by any suitable mechanical or hydraulic driving means,which willimpart reciproc'ation to it. The means for interconnecting the pistonrod 88 with the actuator head 88 comprises a dove-tail 9| slidable inways 92. manner, the piston rod 88 may be shifted from left to right(Fig. 1) to the desired position, depending upon the position of thenozzle 25, so that the shot plunger 88 will be in alignment with thecylinder 59 as closely as possible, the ball and socket joint 88 and theconstruction of the lower end of the actuator rod 84 compensating forany slight misalignment oi these parts. The mechanism for adjusting theposition of the piston rod 88 may comprise any suitable adjustingmechanism, for example, an adjusting screw 93.

Fixed to the upper surfaces of the yoke 18 by means -oi machine screws|88 and |8| (Fig. 7),

In this' is a cross yoke |82 having a central aperture |88 through whichthe sleeve 88 extends. A cover plate |84, which also encircles thesleeve 85, closes substantially all of the aperture |88 and prevents anypossible splashing of metal out through.

the top of the yoke. The cross yoke |82 has a pair of set screws |85 and|88 threaded in it adapted to engage depressions |81 and |88,respectively, formed in an upstanding collar |88 of the cylinder 58,whereby the cylinder will be forced into the seat 58 to seal thecylinder into the seat. The yoke 15 has a pair of projecting shoulders|88 and ||8 and the yoke 18 has a pair of similar projecting shouldersand ||2, which extend through the casing 11 to lock the yoke and casingtogether. .Any suitable heating means (not shown) may be provided withinthe casing 11 for heating the melting pot 48. A preferred form ofheating Ameans may comprise electrical heating units (not shown)imbedded in the walls of the melting pot 48 and connected to a suitablesource of power.

The entire melting pot 48 and the casing 11 are supported by a pair ofchannel members H3 and H4, which are joined together at their left end(Fig. l) .by a cross channel member ||5. The casing 11 is not ilxed tochannel members H3 and H4, but is slidable with respect thereto, beingprovided at its left end (Fig. 1) with a threaded member H8, which isattached to the casing and which is adapted to receive the threadedportion of an adjusting screw ||1. The screw ||1 is provided with a pairof shoulders ||8 and H9, either one of which may cooperate with aremovable abutment member |28. As shown most clearly in Figs. 1`and 5,the abutment member |28 has a slot |2l formed in it to receive a reducedportion of the adjusting screw ||1 between the shoulders |I8 and H8.This abutment member is adapted to be positioned between walls |22 and|23 of a double-walled bracket |24, which is, in turn, attached to asupport block |25. The support block |25 extends into the channel of thechannel member ||5 and is suitably attached thereto whereby when theadjustment screw I|1 is rotated, the shoulder ||8 or shoulder H8 thereonwill engage with the abutment member |28 if itis in the position shownin Figs. 1 and 6, and, accordingly, the entire assembly including themelting pot 48 and casing 11 may be moved to the right or leit along thechannels ||8 and ||4, thus to properly position the nozzle 25 withrespect to the lower die being used in the apparatus. The amount oftravel of the melting pot assembly to accommodate the gates or entranceapertures of the dies is not very great, but the adjustment member 1 isadapted, when rotated, to impart sufiicient movement to the melting potassembly to facilitate its removal or insertion in the apparatus, theremovable abutment member |28 being provided so that the adjustmentscrew. H1'- may be removed after an appreciable amount of movement hasbeen imparted to the melting pot assembly so that the ends ofI thethreads of the adjustment screw ||1 will not be stripped when themelting pot is being removed. l

The support block |25, in addition to supporting the double-walledbracket |44, has a socket |26 formed in it to receive the -upwardlyextending end of a vertical adjustment screw |21, which is threaded intoa base block |28 mounted on the base I8, which is, in turn, providedwith a clearance hole 28 to receive the vertical adjustment screw |21.In placing the melting pot in tively, in a cross bar |45.

adjusted in a horizontal plane by means of the adjustment screw ||1 tobring the spacer element 4| into alignment with the nozzle 25 and,thereafter, the left end of the melting pot assembly may be elevated bymanipulating the adjustment screw |21.

'Ihe lefthand upright member |3 extends down to the base l0, being cutout as shown at |30 to permit access to the adjustment screws ||1 and|21. However, the righthand upright member |4 is supported on a pair ofside walls |3| and |32, whichconstitute a housing for the melting potassembly 43 and casing 11, which are provided with inwardly extendinglugs |33 and |34, respectively (Fig. 7). shouldered apertures |35 and|36 are formed in the lugs |33 and |34 to receive the heads and shanksof support bolts |31 and |38, respectively. The bolts |31 and |38 extenddownwardly beneath the channel ,members ||3 and ||4 and are threadedintothreaded members |39 and |40, respectively, which are provided withrounded upper ends |4| and `|42 adapted to nest in pockets |43 and |44,respec- The cross bar |45 extends beneath the two angle members l|3 andH4 and it is believedcto be apparent that by manipulation of the bolts|31 and |38, the position of the right end of the melting pot assemblymay be suitably adjusted. The base I is cut out as shown at 146 (Figs. 1and 7) to receive the cross bar |45 ard the walls |.3| and |32 are cutout as shown at |41 and |48 to permit adjustment of the right end of themelting pot assembly by moving the cross bar |45. In order to preventthe casing 11 from contacting the walls |3| and |32, spacer members |49,|50, |5| and |52 are attached to the side walls |3| and |32 to guide thecasing 11 in its movement with respect to the walls |3,| and "|32.Afterthe melting pot assembly, including the casing 11, has beenproperly adjusted, set screws |53 and |54 may be engaged with the casing11 and locked in place by lock nuts |55 and |56 to hold the melting pot43 and casing 11 rigid with respect to the rest of the apparatus.

What is claimed is:

1. In a die casting` machine, a melting pot having a gooseneck formedtherein, an adjustable casting for supporting said melting pot in aselected position, an injection cylinder for cooperating with saidgooseneck, an ejector plunger to cooperate with said cylinder, a movableactuator head for actuating said plunger, a piston rod mounted on saidhead and adjustable transversely of the pathA of movement of the head,and a selfhaving an integrally formed gooseneck, a shot cylinder nestingin an end of the gooseneck, a shot plunger' cooperating with saidcylinder, means for adjusting the plunger to align it with the cylinder,and means for aligning the gooseneck with the nozzle, including aframework positioned beneath the melting pot for supporting it, meansfor sliding the melting pot longitudinally of the framework, and meansfor raisin and lowering the framework a 4. In a die casting apparatus,separable dies, one of which has a vertically disposed entranceaperture, a nozzle postionable to direct molten metal vertically intosaid aperture, a melting pot having an integrally formed gooseneck, ashot cylinder nesting in an end of the gooseneck, a shot plungercooperating with said cylinder, means for adjusting the plunger to alignit with the cylinder, and means for aligning the goose- Vneck with thenozzle, including a framework positioned beneath the melting pot forsupporting it, means for sliding the melting pot longitudinallyof theframework, and means for raising and lowering the framework, said meansfor mov ing the melting pot longitudinally of the framework comprisingan adjusting screw having abutment engaging shoulders formed thereon anda removable abutment engageable with a portion of the framework,

5..In a die'casting apparatus, separable dies, one .of which has avertically disposed entrance aperture, a nozzle postionable to directmolten metal vertically into said aperture, a melting pot having anintegrally formedl gooseneck, a shot cylinder nesting in an end of thegooseneck, a shot plungerA cooperating with said cylinder,

a means for yadjusting the plunger to-align it with the cylinder, `andmeans for aligning the gooseneck with the nozzle, including aframeworkpositioned beneath the melting pot for'supporting it, means for slidingthe melting pot longitudinally of the framework, and means for raisingand lowering the framework, said means for raising and. lowering themelting pot comprising a pair of side walls disposed alongside themelting pot, a crossbar positioned beneath and supporting saidframework, and a pair of Support plates aligning means interconnectingthe plunger and piston rod. l

2. In a die casting apparatus, an injecting nozzle adjustable tocooperate with different die apertures, a melting pot and associatedgooseneck adjustable as a unit to feed molten metal to the nozzle, ashot plunger shiftable to position to cooperate with the gooseneck, va.channel iron framework for slidably supporting the melting pot, meansfor raising and lowering the framework to move the gooseneck into andout of association with the nozzle, and means for adjusting the relativeposition of the melting pot with respect to the framework.

3. In 'a die casting apparatus, separable dies, one of which has avertically disposed entrance aperture, a nozzle postionable to directmolten metal vertically into said aperture; a melting pot mounted insaid side walls for raising and lowering the crossbar.

6. In a-die casting apparatus, separable dies, one of which has avertically disposed entrance aperture, a nozzle postionable to directmolten metal vertically into said aperture, a melting pot havinganintegrally formed gooseneck. a shot cylinder nesting in an end of thegooseneck,' a

shot plunger cooperating with said cylinder,-

means for adjusting the plunger4 to align it with the cylinder, andmeans for aligning the gooseneck with the nozzle, including a frameworkpositioned beneath the melting pot for supporting it, means for slidingthe melting pot longitudinally of the framework, and means for raisingand lowering the framework, said means for raising and lowering themelting pot comprising a pair of side walls disposed alongside themelting pot, a crossbar positioned beneath' and supporting saidframework, and a pair of support plates mounted in said side walls forraising and lower-` ing the crossbar to raise one end of the meltingpot, and a bracket mounted on the other end of the framework andsupported from a threaded base block by means of an adjusting screw.

GEORGE L. CHERRY.

CHARLES C. VEALE.

